US5235442A - Method for the recording and for the visual restitution of a tridimensional scene - Google Patents

Method for the recording and for the visual restitution of a tridimensional scene Download PDF

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Publication number
US5235442A
US5235442A US07/856,167 US85616792A US5235442A US 5235442 A US5235442 A US 5235442A US 85616792 A US85616792 A US 85616792A US 5235442 A US5235442 A US 5235442A
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United States
Prior art keywords
plate
coherent light
scene
photographic
coherent
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US07/856,167
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English (en)
Inventor
Jean Claude Grossetie
Marco Franchi
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European Economic Community
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European Economic Community
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Assigned to EUROPEAN ECONOMIC COMMUNITY (EEC) reassignment EUROPEAN ECONOMIC COMMUNITY (EEC) ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FRANCHI, MARCO, GROSSETIE, JEAN CLAUDE
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/48—Laser speckle optics

Definitions

  • the invention relates to a method for the recording and the visual restitution of a tridimensional scene by means of a coherent light source.
  • holographic methods Fringes resulting from an interference between a reference beam and the diffuse light coming from the scene are recorded on a photosensitive plate. During the restitution, the holographic plate is illuminated by a coherent source, and the image of the scene can be observed behind the hologram.
  • the visual range of the scene depends on the observation angle and on the distance at which observation takes place.
  • the invention intends to present a method of photographic recording and visual restitution of a scene allowing to reconstitute the visual field of the scene during restitution independently of the distance from which it is observed.
  • the invention uses a phenomenon which M. Francon has described in a book "La granularite laser (speckle) et ses applications en optique", edition Masson 1978.
  • This speckle phenomenon observed on a photographic plate inscribed by a coherent source is generally considered as an annoying and inconvenient phenomenon. That is why it is eliminated as far as possible both in photographic and in holographic assemblies.
  • FIG. 1 shows diagrammatically the configuration between a coherent source, the scene and the photographic plate during recording.
  • FIG. 2 gives the aspect of a photographic plate such as it is visible after recording of a scene
  • FIG. 3 indicates diagrammatically the configuration between the coherent source, the photographic plate and the observer during visual restitution of the scene.
  • a coherent light source 1 constituted by a laser which emits a fine beam 2 towards an object 3, the image of which is to be recorded.
  • the diameter of the beam 2 is voluntarily very reduced, for example some tenth of millimeters, and illuminates thus a very small portion of the scene 3.
  • a photographic plate 4 is disposed to receive the light reflected from the scene 3.
  • a screen 5 serves to avoid the direct passage of the light between the laser 1 and the photographic plate 4.
  • the micro-holograms form a continuous network of dark and light curves which superpose the spots of the speckle.
  • these curves are nothing else but the recording of continuous interference fields connected both to the surface element on which the incident laser beam is concentrated during recording and to the spatial scene which receives and re-emits the coherent light.
  • the laser speckle phenomenon is always associated with an assembly of continuous interference fields which superpose the laser granularity. This phenomenon has not been pointed out until now, since up to now, very large light beams were used which permitted to illuminate the whole scene. Under these circumstances, the sensitivity of the plates is not adapted and, in addition, the intensity ratios between the phenomena are of an order between them.
  • an illumination by a very fine beam such as it is proposed according to the present invention, it is stated that the interaction between the beam and said element of the scene produces on the surface itself and in its neighbourhood a localized field of interferences.
  • the local structure of these interferences is a function of the local roughness of the scene, and the micro-zones of an intensity which is not nul act all as individual coherent sources.
  • micro-holograms forms a continuous interference network which actually constitutes a natural codification of the scene.
  • a particular plane interference network can be associated in a bi-univocal way to a tridimensional scene.
  • the memorisation, the creation, the reconstitution and the transfer in analogous or digital form of the curves which constitute this network allow thus to work on a very compact codified representation of a spatial scene and no more, as is the case up to now, on representations of images which are plane by definition.
  • the codification thus obtained represents an important gain with respect to the present state of the art and that this gain is at least of the order of 100.000.
  • the method according to the invention presents important technical advantages and permits in particular to get rid of problems of vibration, of natural convection and of the stability of mechanical supports. It has to be underligned that there is no more a reference beam as in the holographic technique.
  • the method according to the invention can be used for multiple scientific as well as industrial or artistical applications.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Holo Graphy (AREA)
US07/856,167 1989-10-11 1990-10-08 Method for the recording and for the visual restitution of a tridimensional scene Expired - Lifetime US5235442A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU87606A LU87606A1 (fr) 1989-10-11 1989-10-11 Procede d'enregistrement et de restitution visuelle d'une scene tridimensionnelle
LU87606 1989-10-11

Publications (1)

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US5235442A true US5235442A (en) 1993-08-10

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US07/856,167 Expired - Lifetime US5235442A (en) 1989-10-11 1990-10-08 Method for the recording and for the visual restitution of a tridimensional scene

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US (1) US5235442A (es)
EP (1) EP0422552B1 (es)
JP (1) JP3213812B2 (es)
AU (1) AU638761B2 (es)
CA (1) CA2066025C (es)
DE (1) DE69008297T2 (es)
DK (1) DK0422552T3 (es)
ES (1) ES2052128T3 (es)
IE (1) IE64168B1 (es)
LU (1) LU87606A1 (es)
PT (1) PT95555B (es)
RU (1) RU2067772C1 (es)
WO (1) WO1991006045A1 (es)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4717221A (en) * 1980-11-05 1988-01-05 Mcgrew Stephen P Diffractive color and texture effects for the graphic arts
US4783133A (en) * 1986-08-26 1988-11-08 Saginaw Valley State University Method and apparatus for forming a hologram from incoherent light
US5138471A (en) * 1990-07-20 1992-08-11 Mcgrew Stephen P Holocomposer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4717221A (en) * 1980-11-05 1988-01-05 Mcgrew Stephen P Diffractive color and texture effects for the graphic arts
US4783133A (en) * 1986-08-26 1988-11-08 Saginaw Valley State University Method and apparatus for forming a hologram from incoherent light
US5138471A (en) * 1990-07-20 1992-08-11 Mcgrew Stephen P Holocomposer

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
Applied Optics, vol. 22, No. 6, Mar. 15, 1983, (New York, US), H. J. Rabal et al.: "Stereograms through a speckel carrier", pp. 881-885.
Applied Optics, vol. 22, No. 6, Mar. 15, 1983, (New York, US), H. J. Rabal et al.: Stereograms through a speckel carrier , pp. 881 885. *
Applied Optics, vol. 27, No. 12, Jun. 15, 1988, (New York, US), M. Trivi et al.: "Three dimensional display through speckle patterns: a single exposure method", pp. 2370-2371.
Applied Optics, vol. 27, No. 12, Jun. 15, 1988, (New York, US), M. Trivi et al.: Three dimensional display through speckle patterns: a single exposure method , pp. 2370 2371. *
P. Harihan "Optical holography: Principles, Techniques and Applications", 1984, Cambridge University Press, ISBN 0521243483.
P. Harihan Optical holography: Principles, Techniques and Applications , 1984, Cambridge University Press, ISBN 0521243483. *

Also Published As

Publication number Publication date
JP3213812B2 (ja) 2001-10-02
CA2066025A1 (fr) 1991-04-12
DE69008297D1 (de) 1994-05-26
IE903625A1 (en) 1991-04-24
PT95555A (pt) 1992-06-30
DK0422552T3 (da) 1994-07-04
WO1991006045A1 (fr) 1991-05-02
PT95555B (pt) 1998-07-31
LU87606A1 (fr) 1991-05-07
EP0422552A1 (fr) 1991-04-17
EP0422552B1 (fr) 1994-04-20
AU638761B2 (en) 1993-07-08
RU2067772C1 (ru) 1996-10-10
ES2052128T3 (es) 1994-07-01
AU6506190A (en) 1991-05-16
JPH06500641A (ja) 1994-01-20
DE69008297T2 (de) 1994-08-04
IE64168B1 (en) 1995-07-12
CA2066025C (fr) 2001-02-13

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